Vacuum cleaner



FIG. 1 is a side view of a vacuum cleaner showing our new design;

FIG. 2 is a side view of the opposite side of FIG. 1;

FIG. 3 is a rear view thereof; and,

FIG. 4 is a top view thereof.

The details shown in broken lines form no part of the claimed design. 

CLAIM We claim the ornamental design for a vacuum cleaner, as shown and described. 